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| Point Forecast: 17 Miles ENE Mount St Helens WA 46.27N 121.86W (Elev. 1473 m) |
Last Update: 1:01 am PDT Aug 3, 2021 |
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| Date | 08/03 | 08/04 | ||||||||||||||||||||||
| Hour (PDT) | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 |
| Temperature (°C) | 18 | 18 | 17 | 17 | 16 | 17 | 19 | 21 | 23 | 24 | 26 | 27 | 27 | 28 | 28 | 27 | 26 | 24 | 23 | 21 | 20 | 18 | 18 | 17 |
| Dewpoint (°C) | 9 | 9 | 9 | 8 | 7 | 7 | 7 | 8 | 8 | 8 | 8 | 8 | 9 | 9 | 9 | 9 | 10 | 12 | 12 | 13 | 12 | 10 | 9 | 9 |
| Heat Index (°C) | 24 | 26 | 26 | 27 | 27 | 27 | 27 | 26 | 24 | |||||||||||||||
| Surface Wind (mph) | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 2 | 2 | 2 | 6 | 6 | 6 | 7 | 7 | 7 | 7 | 7 | 7 | 6 | 6 | 6 | 6 | 6 |
| Wind Dir | E | E | E | E | E | E | E | ESE | ESE | ESE | W | W | W | WNW | WNW | WNW | WNW | WNW | WNW | NNW | NNW | NNW | N | N |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 10 | 10 | 10 | 10 | 11 | 21 | 19 | 18 | 21 | 24 | 15 | 10 | 10 | 10 | 10 | 14 | 10 | 10 | 10 | 10 | 13 | 14 | 15 | 15 |
| Precipitation Potential (%) | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 3 |
| Relative Humidity (%) | 55 | 57 | 57 | 56 | 54 | 51 | 47 | 42 | 38 | 34 | 32 | 31 | 31 | 32 | 33 | 34 | 38 | 45 | 52 | 57 | 59 | 58 | 57 | 58 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Date | 08/05 | |||||||||||||||||||||||
| Hour (PDT) | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 00 |
| Temperature (°C) | 17 | 17 | 17 | 16 | 16 | 16 | 17 | 19 | 21 | 23 | 26 | 27 | 27 | 28 | 28 | 28 | 27 | 26 | 23 | 22 | 20 | 19 | 18 | 17 |
| Dewpoint (°C) | 9 | 9 | 7 | 4 | 3 | 4 | 6 | 8 | 9 | 9 | 9 | 10 | 11 | 12 | 11 | 9 | 9 | 10 | 12 | 12 | 11 | 11 | 9 | 9 |
| Heat Index (°C) | 26 | 27 | 27 | 27 | 27 | 27 | 27 | 26 | ||||||||||||||||
| Surface Wind (mph) | 6 | 5 | 5 | 5 | 5 | 5 | 5 | 3 | 3 | 3 | 6 | 6 | 6 | 8 | 8 | 8 | 8 | 8 | 8 | 7 | 7 | 7 | 7 | 7 |
| Wind Dir | N | N | N | N | N | N | N | NNE | NNE | NNE | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW | NW |
| Gust | ||||||||||||||||||||||||
| Sky Cover (%) | 15 | 33 | 33 | 33 | 36 | 36 | 36 | 27 | 27 | 27 | 32 | 32 | 32 | 32 | 32 | 32 | 36 | 36 | 36 | 36 | 36 | 36 | 40 | 40 |
| Precipitation Potential (%) | 3 | 3 | 3 | 3 | 7 | 7 | 7 | 7 | 7 | 7 | 12 | 12 | 12 | 12 | 12 | 12 | 16 | 16 | 16 | 16 | 16 | 16 | 20 | 20 |
| Relative Humidity (%) | 60 | 58 | 52 | 45 | 43 | 44 | 47 | 49 | 46 | 40 | 36 | 35 | 36 | 36 | 33 | 30 | 31 | 38 | 46 | 54 | 57 | 57 | 58 | 61 |
| Rain | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | SChc | SChc | SChc | SChc | SChc | SChc | SChc | SChc |
| Thunder | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
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